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Thermally Broken Doors & Windows Specs

Thermally Broken Doors & Windows


Shepherd Steel Thermally Broken Windows and Doors are extremely durable and have the ability to create large openings, yet have slender 1 ¼” mullions. The high thermal efficiency of this product provides maximum U-value, and you can choose between double or triple pane Low E glass. Shepherd Steel thermally broken windows and doors can be obtained in a variety of configurations and have great design flexibility. In addition, all thermally broken windows & doors are powder coated.

Slender 1 ¼” mullions are engineered to guarantee maximum structural performance while maintaining maximum design freedom.
Extremely durable – virtually no maintenance costs.
Each unit is engineered to ensure the highest level of design, meeting all structural requirements, and ensuring customer satisfaction.
Oversized units available.


Galvanizing Steel Doors and Windows Process:

Shepherd Steel Doors and Windows can be Galvanized. This process has solved the issue of our high-quality steel doors and windows from rusting. They DO NOT RUST.

Hot-dip galvanizing is the process of immersing iron or steel in a bath of molten zinc to produce a corrosion resistant, multi-layered coating of zinc-iron alloy and zinc metal. While the steel is immersed in the zinc, a metallurgical reaction occurs between the iron in the steel and the molten zinc. This reaction is a diffusion process, so the coating forms perpendicular to all surfaces creating a uniform thickness throughout the part.

Hot-Dip Galvanizing:

The hot-dip galvanizing process has been used since 1742, providing long-lasting, maintenance-free corrosion protection at a reasonable cost for decades. Although hot-dip galvanizing has been utilized to protect steel for generations, the galvanizing process continues to evolve with new technologies and creative chemistries. The three main steps in the hot-dip galvanizing process are surface preparation, galvanizing, and post-treatment, each of which will be discussed in detail. The process is inherently simple, which is a distinct advantage over other corrosion protection methods.